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MIT licensed by David Christiansen and David Darais and Weixi Ma
This is the Final Pretty Printer, an extensible
prettry printing library that supports semantic
annotations and proportional-width fonts.
The library is extensible because it uses a
final, rather than initial, encoding of pretty
printer documents - they are monadic programs,
rather than a datatype. This means it can be
extended by monad transformers.
Semantic annotations allow pretty printer
documents to contain references to the data that
they represent, which can enable interactive output.
Proportional-width fonts are supported by
allowing the measurement of widths to be
performed in some arbitrary monad, so IO can be
used to look at the output of a font rendering library.
